Kinetically Controlled Layer‐by‐Layer Stacking of Metal Oxide 2D Nanosheets

Abstract

An efficient chemical waytofinely control the layerby-layer stacking of inorganic nanosheets (NS) is developed by tuning the type and composition of intercalant ion, and the reaction temperature for restacking process.T he finely controlled stacking of NS relies on ak inetic control of the selfassembly of NS in the presence of coordinating organic cations. Acritical role of organic cations in this assembly highlights the importance of the appropriate activation energy.O fp rime importance is that afine-control of the interstratification of 2D NS is highly effective not only in tailoring its pore structure but also in enhancing its electrode activity.T he present study clearly demonstrates that the kinetically controlled restacking of NS provides af acile and powerfulm ethod to tailor their stacking number and functionality.

NaCl Crystal Tuning Nitrogen Self-Doped Porous Graphitic Carbon Nanosheets for Efficient Oxygen Reduction

“…26−31 In addition, Na + intercalation could effectively control the stacking structure of two dimension nanosheets. 32 Thus, it can expect to get the ideal carbon-based ORR electrocatalysts by rationally engineering the biomass calcination process with NaCl crystal as directing substrate.…”

Enhancing Hydrogen Evolution Reaction Activity of Palladium Catalyst by Immobilization on MXene Nanosheets

“…Two-dimensional (2D) MXenes have attracted significant attention as promising candidates for applications in electrodes, electrocatalysts, and hybridization matrices due to their exceptional electrical conductivity, high electrochemical activity, and diverse structures and chemical compositions. , These properties and abundant surface functional groups of MXenes make them attractive as immobilization matrices for nanoparticles. , Considering that preventing restacking of inorganic nanosheets can improve the surface reactivity, the regulation of 2D materials assembly to create porous architectures presents a valuable opportunity to anchor nanoparticles and enhance their interaction with MXene nanosheets. , Besides, the assembly of 2D nanosheets, including the interlayer distance and the number of monolayers, profoundly affects their efficiency as immobilization matrices for anchoring metal nanoparticles. − In particular, the incorporation of nanoparticles into the interlayer space is supposed to enhance the interfacial electronic coupling with MXene nanosheets through intimate contact at nanoscale. Therefore, simultaneous control of stacking and assembling MXene nanosheets into open architectures is necessary for maximizing the impact of hybridization on the functionality of confined catalytic species. , Considering the decrease in the lattice energy observed in intercalated layered solids due to increased interlayer distance, , a basal plane expansion during assembling with bulky species is expected to increase misalignment of ultrathin exfoliated MXene nanosheets. Moreover, the alteration in the charge density of the guest species can effectively tune the electrostatic interaction with MXene and control the assembly of nanosheets.…”

“…Therefore, simultaneous control of stacking and assembling MXene nanosheets into open architectures is necessary for maximizing the impact of hybridization on the functionality of confined catalytic species. 11,12 Considering the decrease in the lattice energy observed in intercalated layered solids due to increased interlayer distance, 13,14 a basal plane expansion during assembling with bulky species is expected to increase misalignment of ultrathin exfoliated MXene nanosheets. Moreover, the alteration in the charge density of the guest species can effectively tune the electrostatic interaction with MXene and control the assembly of nanosheets.…”